<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
</head>

<body>
  <div id="container" style="width:500px">
    <h1>这是内容网页</h1>
    <a href="/">点我回到首页</a>
    <div id="header" style="background-color:#FFA500;">
      <h1 style="margin-bottom:0;">网页的主标题</h1>
    </div>
    <div id="menu" style="background-color:#FFD700;height:200px;width:100px;float:left;">
      <b>菜单</b><br>
      HTML<br>
      CSS<br>
      JavaScript
    </div>
    <div id="content" style="background-color:#EEEEEE;height:200px;width:400px;float:left;">
      内容就在这里</div>
    <div id="footer" style="background-color:#FFA500;clear:both;text-align:center;">
      Copyright © W3Cschools.com</div>
  </div>
</body>

</html>